A police officer responding to an emergency call has been attacked with a sledgehammer.
The officer was attending reports of a cash machine robbery at Tesco Express in Sandwell in the West Midlands.
Three raiders immediately attacked the police car he was in smashing the window of the car and the striking his head and arm.
The officer has suffered cuts, bruising and severe swelling to his face and arm.
He has been discharged from hospital.
No one has been arrested.